body {
    display: flex;
    justify-content:center;
  }
  
  .cin_item {
    padding: 8px;
    font-size: 20px;
    width: 230px;
    margin-bottom: -10px;
  }
  
  .content {
    display: flex;
    flex-wrap: wrap;
  }
  
  .a, .content .item, .content .item1 {
    border: 1px solid;
    width: 40px;
    height: 40px;
    background-color: white;
    font-size: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-top: 20px;
  }
  
  .content {
    width: 250px;
  }
  
  .content .item {
    margin-left: 10px;
  }